From 1bbda55d42e0f0f6c22791c6c7b13e1915b91857 Mon Sep 17 00:00:00 2001
From: Bart Van Assche <bvanassche@acm.org>
Date: Thu, 2 Jun 2011 14:27:17 +0000
Subject: [PATCH] ib_srpt: Eliminate srpt_rdma_ch.wait_queue

git-svn-id: http://svn.code.sf.net/p/scst/svn/trunk@3514 d57e44dd-8a1f-0410-8b47-8ef2f437770f
---
 srpt/src/ib_srpt.c | 11 ++++-------
 srpt/src/ib_srpt.h |  2 --
 2 files changed, 4 insertions(+), 9 deletions(-)

diff --git a/srpt/src/ib_srpt.c b/srpt/src/ib_srpt.c
index 2aa3e5420..a8316da3d 100644
--- a/srpt/src/ib_srpt.c
+++ b/srpt/src/ib_srpt.c
@@ -1873,7 +1873,7 @@ static void srpt_completion(struct ib_cq *cq, void *ctx)
 	atomic_inc(&ch->processing_compl);
 	switch (thread) {
 	case MODE_IB_COMPLETION_IN_THREAD:
-		wake_up_interruptible(&ch->wait_queue);
+		wake_up_process(ch->thread);
 		break;
 	case MODE_IB_COMPLETION_IN_SIRQ:
 		srpt_process_completion(cq, ch, SCST_CONTEXT_THREAD);
@@ -1895,10 +1895,9 @@ static int srpt_compl_thread(void *arg)
 	ch = arg;
 	BUG_ON(!ch);
 	while (!kthread_should_stop()) {
-		wait_event_interruptible(ch->wait_queue,
-			(srpt_process_completion(ch->cq, ch,
-						 SCST_CONTEXT_THREAD),
-			 kthread_should_stop()));
+		set_current_state(TASK_INTERRUPTIBLE);
+		srpt_process_completion(ch->cq, ch, SCST_CONTEXT_THREAD);
+		schedule();
 	}
 	return 0;
 }
@@ -1964,8 +1963,6 @@ static int srpt_create_ch_ib(struct srpt_rdma_ch *ch)
 		goto err_destroy_qp;
 
 	if (thread == MODE_IB_COMPLETION_IN_THREAD) {
-		init_waitqueue_head(&ch->wait_queue);
-
 		TRACE_DBG("creating IB completion thread for session %s",
 			  ch->sess_name);
 
diff --git a/srpt/src/ib_srpt.h b/srpt/src/ib_srpt.h
index 1ccc73a9e..11cb028d7 100644
--- a/srpt/src/ib_srpt.h
+++ b/srpt/src/ib_srpt.h
@@ -245,7 +245,6 @@ enum rdma_ch_state {
 
 /**
  * struct srpt_rdma_ch - RDMA channel.
- * @wait_queue:    Allows the kernel thread to wait for more work.
  * @thread:        Kernel thread that processes the IB queues associated with
  *                 the channel.
  * @cm_id:         IB CM ID associated with the channel.
@@ -273,7 +272,6 @@ enum rdma_ch_state {
  * @sess_name:     SCST session name.
  */
 struct srpt_rdma_ch {
-	wait_queue_head_t	wait_queue;
 	struct task_struct	*thread;
 	struct ib_cm_id		*cm_id;
 	struct ib_qp		*qp;